Overhead branch-circuit conductors, where the voltage does not exceed 150 volts to ground, shall have a minimum overhead clearance of _________ when crossing over a sidewalk.

When overhead branch-circuit conductors are installed, safety regulations require specific minimum clearances for the conductors to ensure they do not pose a hazard to individuals and property below. For voltages not exceeding 150 volts to ground, the National Electrical Code (NEC) mandates that these conductors maintain a minimum overhead clearance of 10 feet when crossing over sidewalks. This distance is designed to provide adequate space to prevent accidental contact with the conductors, particularly in areas where pedestrians may be present.

Additionally, this clearance helps to ensure that any potential sag in the conductors does not result in them being too low, which could expose individuals to electrical hazards. The 10-foot clearance standard is particularly important in pedestrian areas such as sidewalks, where people of various heights, including children, might pass underneath. It also takes into account the potential for maintenance work, vehicle traffic, and other activities that might occur in proximity to the overhead conductors.